linux-kernel - [PATCH 1/4] PM / devfreq: rk3399

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Date:   Wed, 19 Oct 2016 18:06:24 -0300
From:   Javier Martinez Canillas <javier@....samsung.com>
To:     linux-kernel@...r.kernel.org
Cc:     Javier Martinez Canillas <javier@....samsung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        linux-pm@...r.kernel.org
Subject: [PATCH 1/4] PM / devfreq: rk3399_dmc: Fix module autoload

If the driver is built as a module, autoload won't work because the module
alias information is not filled. So user-space can't match the registered
device with the corresponding module.

Export the module alias information using the MODULE_DEVICE_TABLE() macro.

Before this patch:

$ modinfo drivers/devfreq/rk3399_dmc.ko | grep alias
$

After this patch:

$ modinfo drivers/devfreq/rk3399_dmc.ko | grep alias
alias:          of:N*T*Crockchip,rk3399-dmcC*
alias:          of:N*T*Crockchip,rk3399-dmc

Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
---

 drivers/devfreq/rk3399_dmc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/devfreq/rk3399_dmc.c b/drivers/devfreq/rk3399_dmc.c
index e24b73d66659..77bd9d02e870 100644
--- a/drivers/devfreq/rk3399_dmc.c
+++ b/drivers/devfreq/rk3399_dmc.c
@@ -454,6 +454,7 @@ static const struct of_device_id rk3399dmc_devfreq_of_match[] = {
 	{ .compatible = "rockchip,rk3399-dmc" },
 	{ },
 };
+MODULE_DEVICE_TABLE(of, rk3399dmc_devfreq_of_match);
 
 static struct platform_driver rk3399_dmcfreq_driver = {
 	.probe	= rk3399_dmcfreq_probe,
-- 
2.7.4